fetch eftch ftech tfech etfch tefch fecth efcth fceth cfeth ecfth cefth ftceh tfceh fcteh cfteh tcfeh ctfeh etcfh tecfh ectfh cetfh tcefh ctefh fethc efthc ftehc tfehc etfhc tefhc fehtc efhtc fhetc hfetc ehftc heftc fthec tfhec fhtec hftec thfec htfec ethfc tehfc ehtfc hetfc thefc htefc fecht efcht fceht cfeht ecfht cefht fehct efhct fhect hfect ehfct hefct fchet cfhet fhcet hfcet chfet hcfet echft cehft ehcft hecft cheft hceft ftche tfche fcthe cfthe tcfhe ctfhe fthce tfhce fhtce hftce thfce htfce fchte cfhte fhcte hfcte chfte hcfte tchfe cthfe thcfe htcfe chtfe hctfe etchf techf ecthf cethf tcehf ctehf ethcf tehcf ehtcf hetcf thecf htecf echtf cehtf ehctf hectf chetf hcetf tchef cthef thcef htcef chtef hctef
Note: these 'words' (valid or invalid) are all the permutations of the word fetch. These words are obtained by scrambling the letters in fetch.